FEMALE—Length 14 mm.; black, with yellow maculations; clypeus, lateral face marks extending narrowly nearly to top of eye, and a pair of small, elongate spots back of eyes, creamy-yellow; scutum entirely black or with a pair of small antero-lateral, yellow maculations, axillae with small yellow spots and scutellum with a pair of ovate, subapical maculations which are slightly separated medially; legs black except for a small, basal, yellow spot on tibiae; spurs testaceous; abdominal terga 1-5 with transverse, yellow bands which are subapical, broad laterally, strongly narrowed medially, apical margins of the terga slightly depressed, entirely black; face somewhat longer than distance between eyes; eyes subparallel; lateral ocelli nearer eyes than to margin of vertex, subequally distant from eyes and each other; cheeks considerably broader than eyes; mandibles entirely black, broad apically, with a slight median incision near center of a long cutting edge which is otherwise without teeth; clypeus slightly convex, apical margin with a shallow, vague, median emargination, edge minutely crenulate; tegulae very finely, closely and regularly punctate, with a small, anterior, yellow spot; wings lightly infuscated, veins piceous; pubescence entirely pale, very short and thin, especially above, more dense but still rather short on cheeks, pleura and propodeum; ventral scopa entirely pale ochraceous, sternum 6 with very short pubescence; punctures fine and close in general, but rather deep and distinct, rather well separated but still close at lower margin of supraclypeal area and over clypeus and lateral areas of face, very close across vertex and down the cheeks, fine and dense over entire thorax, the scutum and scutellum being finely rugoso-punctate; punctures close and rather fine on abdominal terga, becoming extremely fine on tergum 5, tergum 6 densely and finely rugoso-punctate, with an apical, ventral lip medially, a deep depression between this and the disc.

MALE—Length 14 mm.; black, with yellow maculations; clypeus, mandibles except teeth, lateral facial maculae extending narrowly nearly to top of eye, and margin of supraclypeal area, narrowly yellow; an elongate yellow mark back of upper half of eye and a pair of very small maculations on cheeks below, adjacent to mandible; thorax without maculations and legs black, but each tibia with a small, basal, and a pair of apical, yellow spots, basitarsi yellow on outer face, remaining tarsal segments brownish; spurs testaceous; abdominal terga 1-5 with entire, transverse, yellow bands, these broad laterally, strongly narrowed medially but not interrupted, the apical depressed margins entirely black; tergum 6 largely yellow, black only narrowly across base, this slightly invading the midline; sternum 7 entirely black; face considerably longer than distance between eyes; eyes subparallel; lateral ocelli much nearer eyes than to margin of vertex and slightly nearer eyes than to each other; cheeks slightly broader than eyes; mandibles without a distinct, median tooth between the apical and inner teeth; clypeus slightly convex, apical margin very nearly straight, with about five minute dentacles; tegulae entirely black, closely and finely punctate; wings lightly infuscated, veins piceous; pubescence entirely pale, rather pale ochraceous on upper part of head and dorsum of thorax, becoming whitish on thorax beneath and on cheeks below; punctures fine and very close in general, close below ocelli and between antennae, more distinctly separated on clypeus, lateral maculated areas of face, and on vertex, becoming rather sparse on the shining cheeks posteriorly; punctures very fine and close on pleura, the scutum and scutellum dull and densely rugoso-punctate, pubescence rather dense and elongate; abdominal terga closely and rather uniformly punctate, but punctures rather coarse on 1 and 2, becoming finer on the more apical segments, rather densely crowded on 6, apical margin of 6 slightly out-curved over median third, 7 short and broad, somewhat shining, with a distinct but low, median angle, lateral angles narrowly rounded, fringed with short, pale pubescence; sterna 1-4 quite fully exposed, 3 and 4 with rather copious, pale ochraceous pubescence, 5 somewhat excavated medially, becoming densely pubescent on each extreme side, 6-8 retracted, form as shown (fig. 9); gonostyli of genital armature broadly expanded and angulate apically, otherwise as shown (fig. 10).

DISTRIBUTION — Primarily western, but reaching Michigan and Mississippi in one or another of its forms, August to October.